Thailand's Constitutional Court Orders New Poll

BANGKOK—Thailand's Constitutional Court on Friday nullified the inconclusive Feb. 2 general election and ordered a new vote, dealing a setback to the government and adding to uncertainties, after months-long street protests and poll disruptions led the country into political deadlock.

In a six-to-three vote, the court, whose ruling is final, said the election was unconstitutional because it wasn't held on the same day nationwide, as...